Respiratory sinus arrhythmia predicts perceived therapy process of a group-based acceptance and commitment therapy...

Area of Science:

• Psychology and Neuroscience
• Psychophysiology
• Clinical Psychology

Background:

• Psychotherapy engagement relies on present-moment focus, mindfulness, and emotion regulation.
• These skills are theoretically linked to parasympathetic nervous system functioning.
• Polyvagal and neurovisceral integration theories offer explanations for these links.

Purpose of the Study:

• To assess the relationship between parasympathetic functioning (respiratory sinus arrhythmia [RSA]) and client engagement.
• To evaluate client reports of engagement in an Acceptance and Commitment Therapy (ACT) group intervention.
• To test predictions derived from polyvagal and neurovisceral integration theories.

Main Methods:

• Twenty-one community residents participated in a group-based ACT intervention for work stress.
• Respiratory sinus arrhythmia (RSA) was measured one week prior to the intervention.
• Client engagement was assessed post-session via ratings of relationship support, task focus, and hindering experiences.

Main Results:

• Clients reported the ACT intervention as supportive, task-focused, and free of significant hindering experiences.
• Higher RSA levels were significantly correlated with higher perceived relationship support.
• No significant associations were found between RSA and task focus or hindering experiences.

Conclusions:

• The findings support the theoretical link between parasympathetic functioning and client engagement in psychotherapy.
• Higher RSA may indicate a greater capacity for relational engagement within therapy.
• Results align with predictions from polyvagal and neurovisceral integration theories regarding emotional regulation and therapy.